Grinding-machine for sharpening edged tools.



E. S. MUMMERT. GRINDINGMAOHIKE FOR SHARPENING BDGED TOOLS.

APPLICATION FILED 0073.16, 1908.

E. SLMUMMERT; GRINDING MACHINE FOR SHARPIBNING EDGED TOOLS.

APPLICATION FILED 001.16, 1908.

987,589. Patented Mar;21,191l.

s snnms-snntr 2.

attomg E. S. MUMMERT. GRINDING MACHINE FOR SHARPENING EDGBD' TODLS.

APPLICATION FILED 0031216, 1908.

. Patented Mar. 21, 1911.

3 BHEETS-SHEET 3.

V attmq UNITED STATES PATENT orif ce.

ERVIN'S. MUMMERT, F HANOVER, PENNSYLVANIA, ASSIGNQR T0 MUMMERT, WOLF 8a- DIXON 00., 0F HANOVER, PENNSYLVANIA.

'GRINDINGMAGHINE FQR SHARPENING EDGED TQOLS.

Specification of Letters Patent. PatentedMar. 21, 1911 Application filed October 16, 1908. Serial No. 458,121.:-

a To all whom it may concern:

' device adapted to remove tening liquid from the wheels and to keep the Be it known'tha-t I, Envm S. MUMMERT, a citizen of the United States, residing at Hanover, in the county of York and Stateof Pennsylvania, have invented a. new and useful GrindingMacl1ine' for Sharpening Edged Tools, &c., of which the fol-lowing. is a specification.

The invention relates to improvements in grinding inach-ii'ies for sharpening tools, etc.

The object of the present invention is to improve the construction of grinding machines, and to provide a simple, efiicient and comparatively inexpensive grinding machine for sharpening all kinds of edged tools, such as are used in pattern shops, planing mills, furniture factories, vehicle works, and all kinds of wood working shops.

A further. object of the invention is to provide a grinding machine of this character, having coarse and fine grinding wheels and equipped with an adjustable tool holder, adapted to enable a flatto'ol, such as a plane bit or chisel to be held in the proper position to impart to the tool the desired bevel, and capable of enabling thetool to be readily transferred from one grinding wheel to the other and of permitting the operator to exert the necessary pressure on the tool for securing the desired abrading action- .\nother object of the invention-is to equip the inaclline with a narrow grinding wheel for gumining saws, a grinding cone for sharpening wood, working gougesyond to provide compactly arranged gearing for siinultrmeously actuating the stropping and grinding devices and to arrange the driving belt at. the hack of the machine so as to be out of the way.

The invention also has for its object to provide means for moistening the grinding wheels to keep LlICll'l clean and sharp, and at the same time. prevent a tool from heat.- ing, and to also equip the machine .with a the surplus moisliquid from splashing in the face of the operator, and capable also of preventing the wheels from glazing.

With these and other objects in View, the invention consists in the construction and novel combination ofparts hereinafter described, illustrated in the accompanying plan view.

fully drawings, and pointed out in the claims hereto'appended; it being understood that various changes in the form, proportion, size and minor details of constructiomwithin the scope of the claims, may be resorted to without departing from the spirit orsacrilicing any of the advantages of the invention.

In the drawings :'Figure 1 is a. front elevation of a grinding machine, constructed in accordance with this invention. Fig. 2

is a side elevation of the some. Pg. 3 is a Fig. 4' is a. central vertical sectional view. Fig. 5 is a transverse sectional view, of Fig. 4:. Fig. (5 is ELllOllZOIltiLl sectional view, taken substantially ,on the line 6-6 of'Fig. 4. Fig. 7 is an enlarged detail sectaken substantially on. the line 5-5 tional view, illustrating the construction of the guard.

Like numerals of reference designate-cor responding parts in all the figures of the drawings.

'The frame of the machine comprises inits construction a main casting 1, forming a support and mounted upon a pedestal or column}; having an enlarged base 3. which is bolted or otherwise secured to the floor, or other supporting surface. The column,

which is hollow, consists of a casting and is provided with a flat circular top 4. to which the casting or support- 1 is secured. The casting or support, which has a fiat circular bottom 5 to fit the top of the column, is provided at the back with a vertical gear case 6, extending above line front.- portion of the casting or support l and having a removable back plate 7, secured to its place by screws S. or other suitable fastening devices. The

front portion of the casting or support 1 receives a pan 9, secured at the rear wall to the gear case by screws 10, or other suitable 'fastening devices and. provided at an intermediate point between its front and rear walls with oppositely disposed depending attaching arms 11, which are fastenedby screws 12 to the front of the casting or support 1. he rear attached portionjlO 1s ocated above the plane of the front portion of thepan, as clearly illustrated in Fig. 4 of the drawings, extended upwardly and rearwardly, as shown in Fig. 2-.

the said rear portion 10} being its verse shaft 16, which is journaled in suitable bearings at the inner sides. of the troughs or depressions 1230f the pan. One of the grinding ston'es isc omparatively coarse grained and is ad pted for fast grinding or'quickly roughing own, and the other has a very fine grain and puts on a smooth keen edge. Motion is communicated to the transverse.

shaft 16 froin a lower longitudinal shaft 17 by means of ears 18 and 19, having intermeshing spire ribs or teeth at their peripheries. The gear 18' mounted on the transverse shaft at the center thereof, and the pan is provided with an 'openin for the said gear 18 and is equipped Wit aremovable substantially semi-cylindrical cap- 20, having laterally extending bearing coverin s or sections 21, secured over the oppositeearings of the pan and detachably mounting the cap 20 thereon. The fastening means for securing the lateral extensions of the cap to the pan retain the transverse shaft in its bearings. p

The lower longitudinal shaft is j ournaled in front and rear bearings 22 and'23 of the casting or support 1, and its'front end receives the spiral gear 19, while its rear end extends into the gear case 6 and has mounted on its. vertical gear wheel 24. The vertical gear wheel 24 meshes with an intermediate inion 25, mounted on a stub shaft 26 and coated between the gem-wheel 24: and an upper" pinion 27 of a longitudinal shaft or spindle 28. The vertical 'sets of gears ext-end 'ing from the upper shaft or spindle 28 to the lower longitudinal shaft 17 are located at an intermediate point between the ends of the said upper shaft or spindle, and they are continuously lubricated by the gear wheel 24, which is designed to travel in a quantity of oil at the bottom of the gear ease, the lubricantbeing carried upward. by the gear wheel 2% to the intermediate pinion, which in turn lubricates the upper pinion.

The front portion 'of the upper longitudinal shaft or spindle is journal'ed in a suitable bearing 29 at the top portion of the gear case, and the rear portion of the said shaft or spindle 28 is'supported by a pair of substantially L-shaped arms 30, extending'rearwardly from opposite sides of the gear case and having their upwardly extending portions arranged at an inclination and united at their upper ends and provided with a bearing 31.- The bearings of the transverse shaft and the longitudinal shaft or spindle are preferably lined with suitable metal to reduce the friction to a minimum and are equipped with oiloups. The power is applied to the machine through a pulley 32,

mounted on the u per shaft or spindle and located between tie gear case and the upwardly extending portions of the arms. 'lhis arranges the belt out of the way and removes it from the front of the machine.

The upper longitudinal shaft is equipped at its front end with a horizontal grinding cone 33, provided with a threaded socket 34, arranged on a reduced threaded portion 35 of the shaft or spindle. The grinding cone 'is designed for sharpening wood working gouges, having inner beveled cutting edges, and it is located centrally of the machine in rear of the transverse shaft op osite the space between the grindin whee s 14 and 15. The grinding cone is also located above the plane of the grinding wheels-14: and 15 and is' arranged in convenient reach from the front of the machine. 7 The front end of the shaft or spindle 28 also carries a stropping wheel 36, arranged concentric with the grinding cone at the inner 'end or base thereof, and provided at its periphery with a forwardly or outwardlyprojecting annular flange, 37, arranged to receive a rim 38. of leather, or other suitable stropping terial. .The leather rim, is extended befiiid the flange to provide a flexible front or'outer portion 38, adapted for stroppin the -beveled inner edges of the gouges' he solidly supported inner portion of the leather pe-" riphery is adapted for stro pingstraiglitoyfiat tools, such as chise s, p ah'e ts, etcr,

, The gear case is provided at the top with a centrally arranged upwardly extending vertical pivot 39, supporting a horizontally swinging arm 40-upon which is mounted a reservoir or receptacle 41. The reservbir or. receptacle ll is provided with a depending pivot 42, piercing the outer end of the arm and having a lower threaded portion 43 for the reception of a thumb nut 44 which is adapted to clamp the reservoir or receptacle in. its adjustment relative tothe arm. l'he reservoir or-receptacle, which is preferably equipped with a removable cover '15, is provided with a projecting discharge tube lo. having a suitable cockor valve 47 for controlling the flow of the contents of the reservoir or receptacle. The reservoir or receptacle is capable of rotary movement on the outer end of the arm 40, and it is securedin its adjustment by the tl'nunh nut 44. The arm 4.0 is adapted to swing horizontally .to either side of the machine to permit the 'discharge tube to be positioned for'moistcnin 2' either grinding wheel. When the horizpnta I arm is swung to either s de ofthe machine,

thb reservoir ni'ay be turned to bring the discharge tube to the front to moistenthe grinding wheels, or to arrange-the discharge tube at the side out of the way, as illustrated:

The reservoir in Fig. 1. of the drawings. or receptacle is designed to be supplied with Zlrerosene oil, which 'moistens the grinding the grinding whee wheels, keeping the same clean and sharp Wheels for moistening the-same accumulates in' the troughs or"depressions 13 of the pan. In order'to prevent the liquid from -sp1ash ing' into theiface of the operator, the grind,

ing machine is equipped at the back of each of the grinding wheels with-"a guard 48,

- consisting of side walls ,orjflanges and a connecting back portion oruwall curved longitudinally and provided'at its lower ends with a rearwsirdly extending projection or rnriii). The guard i'salso provided at its' lower end with an inclined rearwardly projecting lug or car 50,'per forated to receive a pivot 51": and secured by the same to a substantially 'L-shaped bracket 52. The L-shaped bracket has one of its arms or portions arranged vertically and secured to he inner face of. the rear wa'll.of the pan, and'the other arm, which is disposed horizontall extends forwardl and is bif y. 3 my (nted to receive the ear 50, 'Thisfor hinge connection between the ard and' the bracket, the former being ad ustable to position a block 53 of wood or other. suit:- able material properly with relation to the grinding wheel. The block 53, which is fastened between the sides or flanges of the same to the grinding wheel.

, by Eaperin g si guard at the top thereof, bears against the periphery of the rinding wheeland. is adapted to scrape o the surplus duh-leaving enough to keep the surface moist. The guardis secured in its adjustment b means of a vertical screw'54,'mounted in all readed perforation of the horizontal arm of the bracket 52 and provided at its lpper end with a head and having its lower end en-,

.gaging the upper face of the 'lug or arm 49.- The screw is adapted to .be adjusted to permit the block to rest properly on the; periphery of the grinding Wheel, andit .enables the block to be-nrovd towardjhe' grinding wheelas the'parts becbinewornai The guard is also provided at its upper portion with an exterior 'rccess'or 'cup -55,- adaptedto vreceive the kerosene from the moistening device, and arranged to feed the This re'cess or cup, which ta )ers downwardly, ,is formed de walls and an inclined rear wal ,as clearly illustrated in Fig: 7 o f-the -drawings. The back of the guard ls-pro- 'videtl at the bottom of the recess or'cup with one or more perforations 56, and it ha an interiorlyarranged lug 57,'located beneath the perforation and presenting an inclined upperface', adapted to direct the. contents In arranging the 'inoisteniug device, the horizontal arm is first swung to the sidepf the grinding wheel to be moistened, as illustrated in Fig. .3 of

the' drawings, and then the receptacle is partially rotated to swing the discharge tube through an are indicated by the dotted line tube 46 to a point directly above the cup or recess ofthe guard of the righthand gr1nd- 'ing wheel. \Vhen it is desired-to moisten the other grinding wheel, the horizontal arm is partially rotated to swing the moistoning device to the opposite side of the machine,

carry the discharge tube over the cup or recess. The flow of oil into the cup or recess 55 is controlled by the cook or valve 47of wheels. I The lug 57, Whichwis formed intogral withthe guard, extends from the rear of the grinding wheel.

member -58,slidably mounted on a trans- I verse rod' 59, which is carried by a pair of links or liars 60, arranged substantially in an upright position, when the tool holder is in position for use, and pivoted at their lower ends. to the-pan'by-means'of a. transverse pintle rod 61..' The pi'ntle rod passes through dependin ears 62 of the pan and is suitably 'securetfto the lower ends of the links or bars .60. The rod 59, which is squared, as clearly-shown in-Fig. 4 of the ,.'drawings, is provided at its ends with journ'als or, pivots 63, which are arranged in suitable'bearings of'theilinks' 60, and the said 'rog l'is adjustabe to change the position oi ,thtool holding plate. or member with rela- 1 tion .to the links, .The tool holding plate or Y member iii. provided with ears or flanges 64, having rectan r openings conforming to the'configuratlon of the rod 59 and slidably ndd 59. :Th e-Itool holding plate or mom'- (38,, which pierce the links,extendthrough equipped at their, outer ends with thurhb ,release the said arcuate pfiltltHlS G6." this Eonstruction the tool hold1ng'plat-e{ or member may be set at any angle with rela;

gtoward'and' from the -grinding wheelsgiit o permit the desired pressure to be exerted-by the-operator 'on the tool.

The tool holding plate; which is. provided at opposite sides with guide flanges 69, is

and the receptacle or reservoir is turned to,

the-moistening device, so that/the desired quantity of oil will be fed to the grinding wall to a point adjacent to the peripheryv her is adapted to be moved along the rod nuts, adapted to be rotated to clampdmd tion to the links, which are freely movable 57, which carries the discharge end of the s i The machine is equipped with a tool holder c omprising a tool holding plate or moving thesa'id plate or member 58 on the the slots of the arcuate portions 66 and, are

sides-of the yoke are pivoted by a transverse in 72 to ears 73, .de )endin from the tool iolding plate or mein er an arranged near the front end thereof. The yoke is adapted to swing backwardly and forwardly to en-' .able it to clamprtools of different shapes, and the clampir g screw, which on ages the tool, is mortified in a threaded per oration of the top engaging portionof the yoke, as clearly shown in F 1g. 4. When thetool holder is not in use, it is'swung downward out of the Way and is adapted to hang beneath the pan, as illustrated in Fig. 1 of the drawings.

The rear end of the spindle is equipped with a thin or narrow grinding wheel 7,4, designed for gummingsaws, grinding mold bits and yarious other operations.- A substantiallyiL-shaped tool rest 75 is mounted upon an extension 76 of oneof the arms of the frame-of the machine The tool rest, which is horizontal, extends'across one edge of the rear grinding wheeland radially of the rear or outer face ofthe same.

Having thus fully described my inven-l.

"tion, what I claim'as-new and desire to secure' by'Let-ters Patent, is p 1. A'grinding machine including a'pan' havin s aced troughs ordepressions and provi ed etween the same with an aperture,

a shaft journaled' tween the troughs or depressions and extending across the aperture, grinding wheels mounted on'the shaft and located at the said troughs or depressions, means'for rotating-the shaft, said means including a gear mounted on the shaft at the-said aperture, and amp an ranged over the-aperture and supported uponthe'walls of the pan and covering the gear. v .2. A grinding machine including a pan havin spaced troughs "or depressions and provi ed at an intermediate'point with an aperture, said pan being also provided between the aperture and the troughs or depressions with bearings, a shaft journaled -in the spaced bearings, grinding wheels mounted on the shaft and operating'in the troughs or depressions, means for rotating the shaft including a gear located at the said aperture, and a substantially semi-cylindrisions forming covers for the said spacedcal cap covering the aperture and receiving the gear and provided-with opposite extenbearings.

3. A grinding'machine including a front transverse sha spaced grinding wheels mounted thereon, an upper longitudinal spindle arranged-above and in rear of-the I transverse shaft, a grinding device carried y the front endof the spindle, and means for communicating motion from the spindle to the transverse shaft, said means inclnding a set of gears connected with'the spindle at a point intermediate of the ends of the same.

4;.A grindin machine including a front trahsverse shaft, spaced grinding wheels mounted thereon, an upper lon itudinal s indle located above and in rear 0 the said s aft, a grinding device carried by-the s indie, a lowerlongitudinal shaft exten ing rearwardly from the. transverse shaft, gear .-ing connecting the front end of the longi-' tudinal shaft'with the transverse shaft, and

a set of'gears connecting the rear end of the.

longitudinal shaft with the spindle at a point v between the ends thereof. W

5. A grinding machine including a pan', a -transverse shaft extending across the pan, spaced grinding wheels amounted 'on the transverse shaft, an upper longitudinal spindle located above and in rear of the spaces separating the grinding wheels,'a-

'grlnding device carried by the spindle, a

.lower longitudinal shaft mounted below the pan, gearing connecting the longitudinal shaft with the transverse shaft, and other gearing connecting the longitudinal shaftwith the spindle.

6. A grinding machine including a sup- I port provided at the back with a. vertical gear case extending abovethe front portion of the support, a pan mountedon the suppcrt and extending in advance of the same;

a transverse shaft journaled 'in the pan,

spaced grinding wheels 'mounted r'on the}; transverse ,shaft and operating within the pan. an upper longitudinal s indle extend; ing in advance: and in rear 0 the gear case and provided at its front end with a grindcd on the support belowthe pan, gearing for connecting the front end of the-.longL ,tudinal shaft with the transverse shaft,'and a set of gears arranged within the gear case for-communicating motion from the spindle to the lower longitudinal shaft.

7. A grinding machine including a supingdevice, a lower longitudinal shaft mount-Y r05 port provided at the back wit-h a gear casemeeting. the said shafts, and a set of gears. 1 25 arranged within thegear ease'and extending within the spindle to thaldngitil'dinal shaft. '8. ltgrindiug inachinei ncluding a support provided at the backfwith a gear case extended vcrtically, a p'an secured at the obaclrto the gear case and provided with def'fp'ending attaching arms mounted on the front portion of the support, a front shaft 1 -:extending transversely of the pan and inwardly and outwardly to cause the same to bear against the .grindingwheel.

15. A grinding machine including, a grinding wheel, a pivotally mounted guard composed ofspaced-sides and a connecting 70 5 mounted within the same and having grinding means operating with the said pan, and means for rotating the shaft including a .set of gears arranged within the said gear case. Z

9.;A grindingmachine including a column provided withlabase, a support secured upon the upper,end'of the column and pro vided at the back with a gear case extended above the front fi'brtion of the support, a-

panmount'cd on the support and pro ecting in advance of the same, a front shaft extending transversely of the pan, grinding wheels ease, grinding devices mounted -on the spindle at the ends thereof, means for coni-' mounted on the front shaft; a longitudinal spindle located above and in rear of t-he frontshaft and extending through the gear niun-icating motion from the spindle to the front shaft, said means including a set of gears arrangedwithin the gear case, and

means located in rear of the gear case for' rotatin the spindle.

- 10. grinding machine including spaced grinding wheels, h horizontally swinging supporting-arm-located above and in rear- -of the grinding wheels, and a pivoted-reservoir mounted on the arm and provided with an, outlet adapted to; bearranged above either of the grinding wheels.

11. A grinding machine including spaced grinding wheels, guardsadjustably mounted at the back of the grinding wheels and hav- I ing cups and provided with means for discharging the contents of the.cups upon the grinding wheels, 'and;'a reservoir having an outlet and adjustable to arrange the outlet over either of the said cups.

12. A grinding machineincluding a pan having troughs or depressions, spaced grinding wheels operating in the troughs or depressions, guards located at the back of the grinding -\wheels and provided with cups halving discharge OPEIIHIQS for moistening' thegrinding 'wl1eel s,-and a reservoir provided with an outlet andfldjustable to arrange the outlet over either of the said cups.

13. A' grinding machine including a grinding wheel, a hinged guard arranged at the back of the grinding wheel and provided with an interior scraping device for removing superfluous moisture from the grinding wheel.

, 14. A grinding machine including finding-wheel a guard pivoted at a point iiittermediate of its endsat the back of the grinding wheel and provided with a scraping device for. removing the superfluousri. moisture from the grinding wheel, and

means engagingthe guard at one side of the p vot for -a ustmg thesoraping device wall, an d, a srra ing device mounted between the sides 0 the guard and having its engaging-portion located between the said sides and jarra'nged to engage the grinding wheel for removing the superfluous mois- 'ture. 7 i

16. A grinding nacliine including a. grinding wheel, a pivotally mounted guard composed of'spaced sides'and E'COIHIGCtlIIg wall curved longitudinally, and a block secured 8 0 between the sides at oneen'd of the'guard and having-its engaging portionllocated'between the said sides and arranged to hear Y against the grinding wheel, said'gu'ard-heing' it a just-able on its pivot to move theblock in- '85 wardly as the samebecomes worn.

(17-. A grinding machineincluding a grinding wheel and a' pivotallymounted guard provided with a scraping device located within the guard and arranged to engage. sit) the wheel and having adjusting means for moving the scraping device inwardly and outwardly as the parts become "worn.

18.. A grindingmachine including a grind ing whee-La 'guard pivotally mounted at an intermediate point and'provided at one side of the pivot with interiorly arr'angedscrap ingmeans for engaging the grinding wheel, and an adjusting device. engaging the guard at the oppositeside ofthe pivot.

19. A grinding machine including a grinding wheel, a guar located at the back of the wheel and comp'sed of spaced sides, and a connecting back portion, the latter being provided at the bottom witha .rearwardly l05 ext-ending arm, a' lug extending upwardly from the guard at the inner end of the arm,

abracket pivotally receiving the lug, and a screw mounted on the bracket and engaging the arm. a 1

20. p grinding machine including a grinding wheel, and a? guard having spaced sides and provided withran exterior 'cup, said guard being also provided with interiorly arranged means for directing the contents of the cup' upon the grinding wheel.

21. A grinding machine includinga grinding wheel, and a guard having spaced sides. and provided with an exterior cup, said guard being provided with an interiorly arranged lug located below-the cup in position for directing the contents thereof upon the grinding wheel.

22. A grinding machine includinga grinding wheehfpivot'ed links movable freely-toward'afid om the wheel, a rod carried by the links, a tool holder slidable along the rod, and means for adjustably securing the rod tothe links.

23. A grinding machine men in i grind 9 ing wheel, nivoted links movable freely to wardand from the wheel, a rod carried by the links, a tool'holder slidable along-the rod, an arm rigid with the rod and having an arcnate slot, and means operating in the slot for securing the/arm to the adjacent link.

A grinding machine including a grind- 'ing wheel,

with the rod and having an arcuate exension arranged across the adjacent links; and

means for adjustably securing the extension to the links. 25. A grinding machine including agrind- V ing wheel, pivoted links, a rod carried by and 'pivotally connected with the links and provided wit-ha polygonal portion, a tool holder slidable along the polygonal portion of the rod and held against rotary movement there-on, 'and adjusting means for secu'ring the rod in fixed relation witlrthe links.

26. A grinding machine including a grinding wheel, pivoted links, a rod'connecting the links, and a tool holder slidable on the rodand provided with a pivoted yoke having clamping means.

27. Agrinding machine includin a grinding wheel, pivotally mounted lin is freely movable toward .and from the grinding wheel and arranged to swing below the Fame,-.'a pivot-ally moiinted rod carried by the links, a tool holder slidably interlocked with the rod and movable along'the same, and means for adjustably SECIIFJDQ the rod to the .links" to maintain the tool holder in fixed relation with the links without afi'ect ing the sliding movement of the former.

l itestimony that I claim the foregoing as my. own, I have hereto afiixed my signature in the presence of two Witnesses.

ERV'lN S. MUMM ERT.

Witnesses JULIUS WV. Flsoi-inn,

PAUL E. LAU. 

